1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 Although they range from $150-$400 or more, a large capacity (25-70 pints) dehumidifier for a basement (the dampest portion of most homes) or other large area averages $200-$300.
The dehumidifier manufacturer says my dehumidifier will cover 1000 square feet. No, it is usually about half that amount. A manufacturer will sometimes say for example a 70 pint dehumidifier will cover up to 3800 square feet.